from preamble:
"Change Set: isEqualToInAspects Date: 30 September 2001 Author: Markus Gaelli
Object >> isEqualTo: anObject inAspects: someSymbols
Tests, whether I am equal to <anObject> in all aspects defined by <someSymbols>; gives falses as soon as I am not equal in one of the symbols. Gives true for an empty collection of <someSymbols> "!